* When... until 7 am EST Tuesday. Wind chills will be between 30 below and 40 below zero through this evening. Winds will diminish between midnight and daybreak Tuesday when wind chills will still be dangerous, between 15 below and 30 below zero.

* Additional details... the dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes.

Precautionary/preparedness actions...

A wind chill warning means the combination of very cold air andthe wind will create dangerously low wind chill values. Frostbitecan occur quickly and even hypothermia or death if precautionsare not taken.